Average Hourly Cost: The average hourly cost for custom upholstery in the interior designer category is around $100-$150 per hour, depending on the complexity of the job and the quality of the materials used.

Cost Breakdown: The cost breakdown for custom upholstery usually includes a fee for the interior designer's services, the cost of the upholstery materials, and the cost of labor. The cost of the materials and labor can vary significantly depending on the type of upholstery used and the complexity of the job.

Factors Affecting Cost: Several factors can affect the cost of custom upholstery. These include the type and quality of the upholstery, the complexity of the job, and the location and service provider. Higher quality materials and more complex jobs will generally cost more, while simpler jobs and lower quality materials will cost less. The cost of labor may also be higher or lower depending on the location and service provider.